package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill))")
    public void autoFillPointCut() {

    }

    /**
     * 前置通知
     * 自动填充公共字段创建时间更新时间用户等
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();

        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();


        if (operationType == OperationType.INSERT) {
            try {
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class).invoke(entity,currentId);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entity,currentId);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class).invoke(entity,now);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class).invoke(entity,now);
            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                e.printStackTrace();
            }
        } else {
            try {
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entity,currentId);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class).invoke(entity,now);
            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                 e.printStackTrace();
            }

        }

    }
}
